For the Datacenter room, the air conditioning system needs to ensure the correct temperature and humidity in the room. People call it the precision air conditioning system, so what’s so special about it?

What exactly is an air conditioner?

Precision air conditioning (precision air conditioning) abbreviated as PAC (full name is Precision Air Conditioning) is a system used to provide and control precise temperature and humidity for sensitive equipment such as appliances. equipment in the datacenter room, telecom telecommunications system, medical equipment, etc. to ensure the highest performance and longevity of the equipment.

Applications and advantages

The choice of the correct air conditioner needs to be calculated by the supplier in detail from the cooling capacity, the cooling capacity for special equipment, the ability to expand in the future, etc. This calculation must also be done. meet cold standards

Having to use a precision air conditioning system has its own reasons. As we all know, in fields such as telecommunications, IT, banking, insurance, .. devices in data centers such as switchboard systems, server systems, switches, etc. are all devices. They are expensive and need protection, they need to be operated continuously 24/7/365.

To ensure this requirement, the above equipment needs to be operated in a cool and airy environment regularly, otherwise it will not operate correctly, be easily restarted or easily lead to damage. When problems occur, the cost to repair and replace, the loss due to interruption is very high.

Therefore, these data centers need to be cooled down in time, the ideal working environment to both work well and increase the lifespan, these things, conventional air conditioning systems cannot meet. Okay. Therefore, the precision air conditioning system was born to solve this problem and also save electric energy.


Precision air conditioning systems have distinct advantages that fully meet the rigorous requirements of data centers.

Available 24/7/365.

Data centers all have to work 24 hours a day, so the amount of heat generated is continuous and very large (because of the huge amount of data to be processed) and needs to be cooled regularly to operate correctly and increase longevity. Precision air conditioners are designed to ensure cooling for the equipment, ensuring working efficiency, the lowest power loss factor over time.

Temperature Control

The larger and more powerful the data center, the greater the heat generated, which can be 6-10 times the room temperature, so the correct air conditioning system needs to maintain a stable room temperature, usually from 22°C±0.5°C. On the other hand, precision air conditioners quickly detect temperature changes and adjust to the original stable temperature level.

humidity control

Data centers need to maintain constant humidity, just as important as maintaining a stable temperature for equipment to function properly. When the humidity is too high, water vapor can condense and corrode the equipment or may cause a short circuit. Too low humidity can cause static currents to accumulate and damage to equipment.

Air flow control

The flow of air circulating in the data center room is also very important, especially in centers with a high number of high-performance servers and a dense density, at which time the required air flow will have to be many times larger. to ensure that the cooling air flow can reach all servers.

For example, in a normal office room, only 2 airflow changes are needed per hour, while in data centers, this number must be up to 30 times per hour, with 4000-5000 m3/hour of storage. quantity.

In case you do not provide enough proper air flow, hot spots and uneven temperature changes in each area can arise, leading to damage and shortening the life of the device.

Air Filter

Precision air conditioners are designed with the ability to clean the air at a very high level, filtering up to 99% of dust particles over 5 micrometer in size, from 0.5-5 micrometers is 80%.

Deep cooling

Conventional air conditioners will cool the air and dehumidify the air, but precision air conditioners cool the air and control the humidity in the air, so the same theoretical capacity (actual capacity). + power consumption), precision air conditioners have a higher cooling capacity than conventional machines.

Conventional air conditioners use 50% energy for cooling, 50% energy for dehumidification; precision air conditioners use only 5% of energy for dehumidification and 95% of energy for cooling => greater performance.

The ratio  SHR (Sensible Heat Ratio) is a measure of cooling efficiency, the closer this ratio is to 1, the higher the efficiency.


Diagram of the principle of underfloor cooling

From the above advantages of precision air conditioners, the popular applications of this system on the market today include:

  • Server Room.
  • Datacenter.
  • High density data center.

Today, precision air conditioning systems with outstanding performance hybrid technology help ensure IT system operation at the lowest cost. Air conditioning systems installed in a modular form can reduce power consumption for the data center by up to 40%. Continuous operation, guaranteeing no failure for many years, precision with low noise, high reliability, very economical.

Principle diagram of underfloor cooling

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